DeleteOnLoseActivationChangeObserver 146 ui/wm/core/focus_controller_unittest.cc explicit DeleteOnLoseActivationChangeObserver(aura::Window* window) DeleteOnLoseActivationChangeObserver 175 ui/wm/core/focus_controller_unittest.cc DISALLOW_COPY_AND_ASSIGN(DeleteOnLoseActivationChangeObserver); DeleteOnLoseActivationChangeObserver 769 ui/wm/core/focus_controller_unittest.cc DeleteOnLoseActivationChangeObserver observer1(to_delete);